EVERYDAY SCIENCE

Detailed explanation-1: -Parasites and disease-causing organisms feed at the expense of their hosts, weakening them and often causing disease or death. Parasitism and disease are density-dependent effects, because the denser the host population, the more easily parasites can spread from one host to another.

Detailed explanation-2: -Density-dependent limiting factors include competition, predation, herbivory, parasitism, disease, and stress from overcrowding.

Detailed explanation-3: -A limiting factor of a population wherein large, dense populations are more strongly affected than small, less crowded ones. Examples of this type of factor: food and water supply – large population would require for a higher supply of food and water.

Detailed explanation-4: -Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size.